ZX Compact Flash interface
8-bit, full capacity

Schematic   On  schematic is chip select logic. It is practically same as by 8-bit simple IDE interface. But main advance here is that we work with CF card in memory mode, where data transfer  is 8-bit wide, so no capacity loss. Full capacity of CF card is available, while interface remains simple. On table below are other necessary connections between Speccy edge connector and CF card.

ZX pin,
function
B6 (D0)
B7 (D1)
B8 (D2)
B11 (D3)
B12 (D4)
B10 (D5)
B9 (D6)
B3 (D7)
A11 (A2)
A22 (A6)
A21 (A7)
B18 (/RD)
B19 (/WR)
CF pin
21
22
23
2
3
4
5
6
20 (A0)
19 (A1)
18 (A2)
9
36
ZX pin,
function
A6 GND
A6 GND A6 GND A6 GND A6 GND A6 GND A7 GND A7 GND A7 GND A7 GND A7 GND A7 GND
CF pin
1
8
10
11
12
14
15
16
17
39
41
50

ZX pin,
function
A3 VCC
A3 VCC A3 VCC A3 VCC A3 VCC A3 VCC






CF pin 13
32
34
35
38
44